Would a Z590 motherboard improve RTX 3070 performance with an i9-10850K?

Thanks, that clears things up and saves me from buying a motherboard for no real benefit. I mainly use the PC for recording bands and mixing, where it works perfectly, and gaming is more of a bonus. I’ll stick with the current setup for now.

I wouldn’t replace the motherboard just for PCIe 4.0. The upgrade cost isn’t justified by the expected performance gain, especially with an RTX 3070. If you eventually want noticeably better gaming performance at 1440p, upgrading the graphics card would make much more sense, although your CPU could become a limit in some games.

Since the system is already handling your recording and mixing work well, keeping the current platform is probably the sensible choice. There’s no urgent need to move to DDR5 or replace the board just for this feature. Enjoy the setup until you have a performance problem that a real component upgrade can solve.

A Z590 motherboard won’t provide a meaningful graphics boost here. The i9-10850K’s CPU-connected PCIe lanes are still PCIe 3.0, so the graphics card would continue operating at PCIe 3.0 speeds. Even when comparing PCIe 3.0 and 4.0 directly, an RTX 3070 usually sees only a tiny difference in real-world performance.